Telegraph-transmitter.



B. F. BBLLOWS.

' TELBGRAPH TRANSMITTER. Arrmonmn funn JULY 29,1907.

939,383. Patented Nom-9,1909. l 4 SEBTS-SBBET l.

B. F. BBLLOWS. TBLBGRAPH TRANSMITTER. APPLICATION FILED JULY 29,1907.

Patented Nov. 9, 1909.

2 SHEETS-SHEET 2.

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"Tofall whom fitr/nay concemp'- ,"'Be it knownthat I, BnNJAMIN'F. Barr' Lows, a citizen vof the'United States, resid- 'at Cleveland, in the county of Cuyahoga 5, and State of' Ohio, have invented a certain nevv and useful Improvement in. Telegraph- `Q"lr'ansmitters,` of'which the following f fau, den, and exact description- The object of `this invention is to provide i' a novel andl etlcienttelegraph transmitterv of rthe type in which asuccessioii ofshort electrical impulsesf-as many as requiredfmay 'be produced 'on 'the telegraph line Wire by a single movementsoff an operating lever or "key "combinations of parts hereinafter describedv faridpointed out definitely in the claim( fIn the drawing, FigureA 1 isfa plan "View uffa telegraph transmitter embodyingmy invention.` YFig. 2 is a front elevationllthere- "fofi Fig'. 3 is a bottom-plan view'. Fig. l is 'af'sectional view in thezplane indicated-by line 4*-4 o'n Fig.4 3.. F ig. 5 is an elevation ,fi'om the'left end of Fig, 1.

metal so as to be electrical co nductorsv fi Zand 3" are the two binding posts to. vvh1ch the terminals of the telegraph line W1re may "connectedf `The binding post 2 is elec-` trically connected with the base, Whilebindin'gf'post 3 is 'insulated therefrom.,k This binding post is,ho"\vever, 7electrically connected'with a plate 4, which is secured upon butinsulated from the base,-tl1e electrical connection being through" a bar 5, and the 40 screws 6 and 7. t

10represents a vibrator which, in the `form shown, a thin metal reed Whichis fastened at one end to a suitable standard-9, secured to and electrically connected with the base 1. A Weight/11 is secured to this vibrator. This vibrator has Within itself the inherent ca pacity for continued vibration for' a considerable time, when said vibration isonce initiated. It is evident that when the vibrator is pushed to one side of the position in which it-Wou-ld normally come to rest, energy for initiating the vibration is imparted to it. The means shown for so -moving the consists of. a bell crank lever 13,' one arm of Speeication of Letters Patent. Application meiruly se, 1907. serial Ng. 386,105.' J

'the semilautomatic,typeffthat f is` to Isayfof' if The invention may v'be summarized as the 'Inthe drawing 1' representsvthe base of 'thefinstrumenu This base, and many of the other parts of the device are preferably made' vibrator to one side of its normal position,-

\. BENJAMIN?. BELLoWs, or CLEVELAND, omo.

i .fTL-EeNArIr-Tnnnsnrrrna. i

Patented Nv. 9, 1909.

` f yof leather 12 secured to the 'face of the Weight 11. A contractile coiled spring.. 14

exerts'itsforceto move the bell crank lever in that direction which pushes the vibrator en -101 to one side of its natural position, and againstadead stop 15, which isin theform of an adjustable screw. A fiat metal contact `springll is made fast at :one end to, a pro- ,jection on the plate 4, being thereby linsues lated .from the base. Two contacts 17 and 18 carried respectively by the vibrator 1.()andV theI spring 16 are separated when the vibratoris held in the restrained position which is to oneside of its natural position, but Will 7 0 be brought into contact every time the vibrator swings away from itsrestrained position. Every time these contacts meet the' line .wire `circuit Will be closed, and will remain closed as long as these contacts touch leach other.

.Inas'much as the vibrator 10 is vibrating Withconsiderable rapidity, the duration of time When these contacts are touching will be short. `Therefore the electrical impulse What telegraphers calla dot.

2O represents a .key lever, Whichisfpivoted on a vert-ical pivot'to the standardv 9. -A

link 19 connects an arnr of theV bell crank lever 1 3 With the key lever 20. The con- 85 nection between this link and lever maybe of any suitablesort; but a suitable connection is made through a'disk 21 attached to the lever `which projects into a notch` 22 in the link,`the end of the link entering alhole in saidlever.' By pushing the lever 20 to the right the linkv is moved so as to cause lever l?) -t0 rock and release the vibrator 10 from restraint. It thereupon begins to vibrate, and causesa dot impulse during each vvibratoryexcursion, until a sufficient number `of impulses have been produced. Then the operator releases the lever 20, whereupon spring 14 swings lever-.13 and the latter, by

engaging with the vibrat0r,stops its vibration 100 and pushes it back a aiust the dead stop 15. i

Because of great iiferences in the sending and in the'receiving ability of different operators, and because of differences in the character of Ithe current on the line Wire, it

is essential, in order that an instrument may have some universality of usefulness, that it be capable of certain kinds of adjustment.

Means may be provided for varying the ra idity with which the vibrator 10 Will 11.0

vi rate, and for varying the duration of each dot impulse produced by that vibra- `producedfwill be short and/Will `produce 80 tion, This latter variation causes the instrument to send light orheavy according to the operators desire, and the requirements of the current. In order that both of these adjustments may be easily and quickly made, a coiled spring 23 is connected at one end With the end ot the vibrator l0. A. flexible cord or thread 24 is connected with theother end of this spring 23. lt is then extended in substantial alinement with the vibrator un der the end of a screw 25 which is adjustable through a post 2G. This screw has a groove in it in which the thread lies, and the thread is connected to and capable of being wound upon the end 28 of a shaft Q9 which may also be turned in the post 26.

In order to change the. rapidity with which the vibrator 'l0 may vibrate, the thread 24 may be wound upon the shaft 28, thereby increasing` the tension ot spring 223, the result being` to increase the rapidity with which vibrator 10 will vibrate. By turning this shaft 2t) in the other direction the cord is unwound and spring Q3 is allowed to contract, and this causes the vibrator 10 to vibrate more slowly. In order to vary the duration of the dot. impulses produced by the vibration so as to make them light or heavy, one may screw the screw 25 in or out as required. This will carry the thread along with it and will vary the direction in which the pull ot' that thread is exerted through spring Q3 upon the vibrator. .lf the end ot' the spring is carried to the left, as shown in Eig. 5, the sending will be made correspondingly light. If moved in the other direction, it will be correspondingly heavy.A

For making the dash impulses on the line wire, an independent lever Bt) is em.- ploy'ed. It is pivoted on a vertical pivot of the standard t), and lies close to and parallel with the lever Q0. A spring :ll ot a welt known sort holds this levcrnormally against the stop 32. lly pushing the lever to the lelit against thc force ot' this spring, the lever is brought into contact with the end ot' a screw 233 which is adjustable through a post 34 on plate 4t, and thereby the circuit ot' the main line is com pleted.

To use the described instrument for sending the Morse alphabet, the operator pushes the key 30 to the left and holds it against screw 33 10110 enough to make a dash impulse on the line wire,--the circuit'l of which is 'thereby closed. To make a succession of dot impulses the operator pushes the lever 20 to the right and holds it over, in opposition to the force ofthe spring 14, until the vib z tor l0 has made the required number of vibratory excursions, each of which produces a dot impulse 'on the main line.

The described construction is simple and durable. lt may be adjusted very quickly and easily to vary the rate of dot making and render the dots light or heavy as required. Uoreover, the construction is one which permits the device to be made so small that it may be conveniently carried by the operator from place to place.

llaving'described my invention, I claim:

ln a telegraph transmitter, the combination of a vibrator, a key lever, spring actu ated meansl under the control ot the key lever for detiecting the vibrator from its normal position, a contact'. carried by said vibrator, a spring arm lixed at one end and having near its other. end a contacty point opposed to the contact point on the vibrator, the -vhrator and said spring being ele.1:tric ally connected with opposite terminals ot a telegraph circuit', a second key lever adjacent to the first mentioned lever, a contact. associated with the second key lever and adapted to be engaged thereby by a movement of said key lever toward thc first mentioned key lever, a spring acting upon the second key lever to move it away from the lil-st mentioned key lever` a stop limiting said movement; said key lever amlcontact. being electrically connected with opposite terminals ot' the same telegraph circuit specified.

ln testimonv whereof, l hereunto alli.\' my signature in t le presence ot' two \\'itncsscs.

BENJMIN l?. lllLLOWS.

W it nesses:

llor Sol man, An'rnlrn J. l. Henson'. 

